[单选题]Quality management ensures that an organization , It has foor main components; quality planning,quality assurance. Quality control and quality ( )
正确答案 :A
improvement
解析:A
[单选题]假如U、P、R分别在5、6、7,下列哪个一定正确?
正确答案 :B
S在第2孔。
解析:解析:1 2 3 4 5 6 7
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